Comparing Dry Type and Oil Immersed Transformers

Transformers are essential components in electrical systems, as they help to regulate voltage Levels and ensure the efficient transmission of electricity. There are two main types of transformers commonly used in power distribution systems: dry type transformers and oil immersed transformers. In this article, we will compare these two types of transformers, focusing on their design, performance, and applications.

model	Rated\\u00a0capacity\\u00a0\\uff08KVA\\uff09	Voltage\\u00a0combination\\uff08KV\\uff09	No-load\\u00a0losses\\uff08W\\uff09	Load\\u00a0losses\\uff08W\\uff09	No-load\\u00a0current\\u00a0(%)	Short-circuit\\u00a0impedance\\u00a0(%)
S11-630	630	33,35/6.3,6.6,10.5,11	830	7870	1.10	6.5
S11-800	800	33,35/6.3,6.6,10.5,11	980	9410	1.00	6.5
S11-1000	1000	33,35/6.3,6.6,10.5,11	1150	11540	1.00	6.5
S11-1250	1250	33,35/6.3,6.6,10.5,11	1410	13940	0.90	6.5
S11-1600	1600	33,35/6.3,6.6,10.5,11	1700	16670	0.80	6.5
S11-2000	2000	33,35/6.3,6.6,10.5,11	2180	18380	0.70	6.5
S11-2500	2500	33,35/6.3,6.6,10.5,11	2560	19670	0.60	6.5
S11-3150	3150	33,35/6.3,6.6,10.5,11	3040	23090	0.56	7.0
S11-4000	4000	33,35/6.3,6.6,10.5,11	3620	27360	0.56	7.0
S11-5000	5000	33,35/6.3,6.6,10.5,11	4320	31380	0.48	7.0
S11-6300	6300	33,35/6.3,6.6,10.5,11	5250	35060	0.48	7.5
S11-8000	8000	33,35/6.3,6.6,10.5,11	7200	38500	0.42	7.5
S11-10000	10000	33,35/6.3,6.6,10.5,11	8700	45300	0.42	7.5
S11-12500	12500	33,35/6.3,6.6,10.5,11	10080	53900	0.40	8.0
S11-16000	16000	33,35/6.3,6.6,10.5,11	12160	65800	0.40	8.0
S11-20000	20000	33,35/6.3,6.6,10.5,11	14400	79500	0.40	8.0
S11-25000	25000	33,35/6.3,6.6,10.5,11	17020	94100	0.32	8.0
S11-31500	31500	33,35/6.3,6.6,10.5,11	20220	112900	0.32	8.0

Dry type transformers, as the name suggests, do not use oil as a cooling medium. Instead, they rely on air to dissipate heat generated during operation. This makes them a popular choice for indoor applications where the use of oil may pose a Safety hazard. Dry type transformers are also more environmentally friendly, as they do not require the use of oil, which can be a potential source of pollution if not properly managed.

On the other hand, oil immersed transformers use oil as a cooling medium to dissipate heat. The oil helps to transfer heat away from the transformer’s windings, ensuring that it operates within safe temperature limits. Oil immersed transformers are typically used in outdoor applications, where the risk of fire or explosion is lower. However, they require regular maintenance to ensure that the oil is clean and free of contaminants that could affect performance.

In terms of performance, both dry type and oil immersed transformers have their advantages and disadvantages. Dry type transformers are known for their high efficiency and low maintenance requirements. They are also more compact and lightweight compared to oil immersed transformers, making them easier to install and transport. However, dry type transformers may not be suitable for high-power applications, as they have limited cooling capacity compared to oil immersed transformers.

Oil immersed transformers, on the other hand, are known for their durability and reliability. The oil helps to insulate the transformer’s windings and protect them from moisture and contaminants, ensuring a longer service life. Oil immersed transformers are also better suited for high-power applications, as they can handle higher loads and provide better cooling performance. However, they are more expensive to purchase and maintain compared to dry type transformers.

In terms of applications, both dry type and oil immersed transformers are used in a wide range of industries, including power generation, distribution, and industrial applications. Dry type transformers are commonly used in buildings, hospitals, and data centers, where safety and space constraints are a concern. Oil immersed transformers are typically used in outdoor substations, power plants, and industrial facilities, where high-power requirements and reliability are critical.

Type	Rating\\u00a0power\\u00a0\\uff08KVA\\uff09	Voltage\\u00a0combination\\uff08KV\\uff09	Off-load\\u00a0losses\\uff08W\\uff09	Load\\u00a0losses\\uff08W\\uff09	Off-load\\u00a0current\\u00a0\\uff08%\\uff09	Short-circuit\\u00a0voltage\\u00a0\\uff08%\\uff09
SCH15-30	30	6,6.3,6.6,10,11/0.4	70	710	1.6	4.0
SCH15-50	50	6,6.3,6.6,10,11/0.4	90	1000	1.4	4.0
SCH15-80	80	6,6.3,6.6,10,11/0.4	120	1380	1.3	4.0
SCH15-100	100	6,6.3,6.6,10,11/0.4	130	1570	1.2	4.0
SCH15-125	125	6,6.3,6.6,10,11/0.4	150	1850	1.1	4.0
SC(B)H15-160	160	6,6.3,6.6,10,11/0.4	170	2130	1.1	4.0
SC(B)H15-200	200	6,6.3,6.6,10,11/0.4	200	2530	1.0	4.0
SC(B)H15-250	250	6,6.3,6.6,10,11/0.4	230	2760	1.0	4.0
SC(B)H15-315	315	6,6.3,6.6,10,11/0.4	280	3470	0.9	4.0
SC(B)H15-400	400	6,6.3,6.6,10,11/0.4	310	3990	0.8	4.0
SC(B)H15-500	500	6,6.3,6.6,10,11/0.4	360	4880	0.8	4.0
SC(B)H15-630	630	6,6.3,6.6,10,11/0.4	420	5880	0.7	4.0
SC(B)H15-630	630	6,6.3,6.6,10,11/0.4	410	5960	0.7	6.0
SC(B)H15-800	800	6,6.3,6.6,10,11/0.4	480	6960	0.7	6.0
SC(B)H15-1000	1000	6,6.3,6.6,10,11/0.4	550	8130	0.6	6.0
SC(B)H15-1250	1250	6,6.3,6.6,10,11/0.4	650	9690	0.6	6.0
SC(B)H15-1600	1600	6,6.3,6.6,10,11/0.4	780	11730	0.6	6.0
SC(B)H15-2000	2000	6,6.3,6.6,10,11/0.4	1000	14450	0.5	6.0
SC(B)H15-2500	2500	6,6.3,6.6,10,11/0.4	1200	17170	0.5	6.0

In conclusion, both dry type and oil immersed transformers have their own unique advantages and disadvantages. The choice between the two types of transformers will depend on factors such as the application, budget, and maintenance requirements. When selecting a transformer for your project, it is important to consider these factors carefully to ensure that you choose the right type of transformer for your specific needs. If you are looking for a reliable and durable transformer, consider working with a reputable China manufacturer who can provide you with high-quality transformers that meet your requirements. Be sure to check out their videos to see their products in action and learn more about their capabilities.